The male passenger (name not revealed by the airline) complained of chest pain, following which the pilot decided to divert the Airbus A321 aircraft to Mumbai, an Air India spokesperson said.
Air India flight AI 906, carrying 164 passengers, had departed from the Dubai International Airport at around 11.30 last night.
On landing, the passenger was deplaned for medical examination, the AI spokesperson said, adding the flight with remaining passengers left for Chennai at 0455 hours this morning.
Doctors from Mumbai International Airport Limited conducted medical tests and declared the passenger fit for travelling. He will be flying to Chennai on another Air India flight, the official added.